| 503 | 8 | 214 |
| 下载次数 | 被引频次 | 阅读次数 |
【目的】机制砂代替天然砂配制自密实混凝土已成为工程建设的发展趋势，徐变是混凝土的固有特性，为研究加载龄期对机制砂自密实混凝土徐变性能的影响，【方法】对7 d、14 d、28 d三种不同加载龄期的混凝土试件进行了压缩徐变试验，探究了徐变随加载龄期的发展规律，并通过LINK3D非线性软件对不同加载龄期和石粉含量的混凝土徐变进行数值模拟，分析了加载龄期和石粉含量对机制砂自密实混凝土徐变的影响。【结果】结果表明：加载龄期增大会减小机制砂自密实混凝土的徐变，持荷250 d时，14 d、28 d加载龄期的徐变系数是7 d龄期的82.5%、71.5%;LINK3D可以较好地模拟混凝土的徐变试验，当石粉含量为5%时，填充效应的正作用使徐变变形减小，石粉含量大于10%时，随石粉含量增加徐变增大；模拟得到的不同加载龄期的单位徐变比在普通混凝土的范围内。【结论】机制砂中石粉含量宜在10%以内；当徐变对结构性能影响较大时，可增大养护龄期。
Abstract：[Objective]Manufacture sand has become the development trend of engineering construction to replace natural sand in the preparation of self-compacting concrete, and creep is an inherent property of concrete. In order to study the influence of the loading age on the creep performance of manufacture sand self-compacting concrete, [Methods] compression creep tests are conducted on concrete specimens with different loading ages of 7 d, 14 d and 28 d, which could investigate the development law of creep with loading age, and numerical simulations are performed by LINK3D non-linear software to analyze the influence of loading age and stone powder content on the creep of concrete.[Results] The results show that the increasing loading age decreases the creep of manufacture sand self-compacting concrete. When subjected to a load of 250 days, the creep coefficients for 14 d and 28 d ages are 82.5% and 71.5% of 7 d. LINK3D software enables better simulation of concrete creep tests. The positive effect of the filling effect reduces the creep deformation when the stone powder content is 5%, and increases with increasing stone powder content when the stone powder content is greater than 10%. The simulated creep ratios per unit at different loading ages are within the range of normal concrete.[Conclusion]The stone powder content of manufacture sand should be within 10%. It is possible that increasing the curing age can reduce the influence of creep on structural performance.
[1] 冷发光，李承宗，邢锋.实现水工大体积混凝土高性能化问题的探讨[J].水利水电技术，2000,31(7):1-3.LENG Faguang,LI Chengzong,XING Feng.Discussion on the problems of the performance-enhancing of mass concrete of hydraulic structure engineering[J].Water Resources and Hydropower Engineering,2000,31(7):1-3.
[2] 马涛.混合砂对混凝土性能的影响及其应用[D].北京：中国矿业大学，2020.MA Tao.Effect of Mixed Sand on Concrete Performance and Its Application[D].Beijing:China University of Mining and Technology,2020.
[3] 薛汇林，陈明亮，唐志波，等.机制砂中石粉对混凝土物理力学性能的宏细观影响机制[J].工程科学与技术，2022,67(3):1-11.XUE Huilin,CHEN Mingliang,TANG Zhibo,et al.Macro-micro mechanisms for the effects of stone powder in manufactured sand on physical and mechanical properties of concrete[J].Advanced Engineering Sciences,2022,67(3):1-11.
[4] 蒋正武，梅世龙，任强.机制砂高性能混凝土[M].北京：化学工业出版社，2020.JIANG Zhengwu,MEI Shilong,REN Qiang.Manufactured Sand High-performance Concrete[M].Beijing:Chemical Industry Press,2020.
[5] 陈维敏，王灯灯，韩旭东，等.不同石粉含量机制砂混凝土徐变研究[J].混凝土，2022,44(8):71-73.CHEN Weimin,WANG Dengdeng,HAN Xudong,et al.Creep of manufactured sand concrete with different limestone powder contents[J].2022,44(8):71-73.
[6] ATRUSHI D S.Tenside and compressive creep of early age concrete:testing and modelling[D].Thesis,Norway:Norwegian University of Science and Technology,2003.
[7] 王建慧，陈晨，张海鹏，等.预应力钢筒混凝土管在水工结构中的应用[J].水利发展研究，2018,18(10):46-49.WANG Jianhui,CHEN Chen,ZHANG Haipeng,et al.The application of prestressed steel tube concrete pipes in hydraulic structures [J].Water Resources Development Research,2018,18 (10):46-49.
[8] 李华，汪洋，王育江，等.膨胀剂对混凝土早期基本徐变的影响[J].建筑材料学报，2022,25(3):256-262.LI Hua,WANG Yang,WANG Yujiang,et al.Effect of expansive additives on basic creep of early-age concrete[J].Journal of Building Materials,2022,25(3):256-262.
[9] 李建慧，李爱群.混凝土结构收缩徐变效应随机分析[J].工业建筑，2016,46(9):76-80.LI Jianhui,LI Aiqun.Stochastic analysis of concrete structures due to shrinkage and creep effects[J].Industrial Construction,2016,46(9):76-80.
[10] 张震雷，史美伦，杜江.聚合物改性水泥浆体黏弹性的频率响应(Ⅰ):动态力学分析[J].建筑材料学报，2022,25(4):339-343.ZHANG Zhenlei,SHI Meilun,DU Jiang.Frequency response of viscoelasticity of polymer modified cement paste(Ⅰ):Dynamical mecnanical analysis[J].Journal of Building Materials,2022,25(4):339-343.
[11] 罗俊胜，徐志胜，熊伟.再生骨料高性能混凝土收缩徐变对比试验研究[J].工业建筑，2014,44(1):79-83.LUO Junsheng,XU Zhisheng,XIONG Wei.Effect of recycled aggregate on shrinkage and creep of HPC:Comparative trial[J].Industrial Construction,2014,44(1):79-83.
[12] 李飞隼.高石粉含量机制砂对水工混凝土压缩徐变的影响研究[D].宜昌：三峡大学，2019.LI Feisun.Study on the influence of manufactured sand with high stone powder content on compression creep of hydraulic concrete[D].Yichang:China Three Gorges University,2019.
[13] 芮捷，刘唐志，王兵，等.机制砂级配对高强混凝土性能的影响研究[J].中外公路，2014,34(1):298-300.RUI Jie,LIU Tangzhi,WANG Bing,et al.Study on the influence of manufactured sand gradation on the performance of high-strength concrete[J].Journal of China & Foreign Highway,2014,34(1):298-300.
[14] 夏晋，吴仁杰，金伟良，等.机制砂钢筋混凝土梁的徐变特性[J].建筑结构学报，2020,41(S2):227-234.XIA Jin,WU Renjie,JIN Weiliang,et al.Creep characteristics of reinforced concrete beams made with manufactured sands[J].Journal of Building Structures,2020,41(S2):227-234.
[15] 范晴.云南部分地区机制砂混凝土性能研究[D].重庆：重庆交通大学，2010.FAN Qing.Research on The Performance of Machine-made Sand Concrete in Parts of Yunnan Province[D].Chongqing:Chongqing Jiaotong University,2010.
[16] PANG L,LIU Z,WANG D,et al.Review on the application of supplementary cementitious materials in self-compacting concrete[J].Crystals,2022,12(2):180.
[17] WU H,SHEN B,MA K,et al.Assessment of mechanical properties of C80 concrete prepared with different stone powder contents by a statistical analysis[J].Journal of Building Engineering,2022,56(8):104754.
[18] XIE Y,QIAN C,XU Y,et al.Effect of fine aggregate type on early-age performance,cracking analysis and engineering applications of C50 concrete[J].Construction and Building Materials,2022,323(37):126633.
[19] SHEN W,LIU Y,WANG Z,et al.Influence of manufactured sand′s characteristics on its concrete performance[J].Construction and building materials,2018,172(40):574-583.
[20] 张景奎，刘长顺.小型渠系装配式建筑质量评价体系研究[J].水利发展研究，2021,21(6):102-105.ZHANG Jingkui,LIU Changshun.Research on the quality evaluation system of small canal system Prefabricated building [J] Water Resources Development Research,2021,21 (6):102-105.
[21] KAEWMANEE K.A New Testing Method for Creep Behavior of self-compacting Concrete at Early Age[D].Kochi:Kochi University of Technology,2001.
[22] 阎培渝，周智凯，刘卫未，等.高强自密实混凝土徐变特性的研究[J].工业建筑，2016,46(9):108-111.YAN Peiyu,ZHOU Zhikai,LIU Weiwei,et al.Study of the creep behavior of high strength self-compacting concrete[J].Industrial Construction,2016,46(9):108-111.
[23] 罗素蓉，晁鹏飞，郑建岚.自密实混凝土拉压徐变比较试验研究[J].工程力学，2012,29(12):95-100.LUO Surong,CHAO Pengfei,ZHENG Jianlan.Comparing experimental analysis between compressing and tensile creep of self-compacting concrete[J].Engineering Mechanics,2012,29(12):95-100.
[24] 晁鹏飞，郑建岚.自密实混凝土徐变性能试验研究[J].建筑结构学报，2010,31(2):99-103.CHAO Pengfei,ZHENG Jianlan.Experimental research on creep of self-compacting concrete[J].Journal of Building Structures,2010,31(2):99-103.
[25] 郑怡，张耀庭.石灰岩质机制砂混凝土收缩徐变性能的试验研究[J].土木工程学报，2013,46(12):59-65.ZHENG Yi,ZHANG Yaoting.Experimental study on shrinkage and creep behavior of crushed limestone sand concrete[J].China Civil Engineering Journal,2013,46(12):59-65.
[26] 杨超，陈梦成.基于Kelvin链率型模型的混凝土徐变有限元计算[J].华东交通大学学报，2021,38(1):17-22.YANG Chao,CHEN Mengcheng.Finite element calculation of concrete creep based on rate-type law visualized by the Kelvin chain model[J].Journal of East China Jiaotong University,2021,38(1):17-22.
[27] 郭航忠，王建，董玉文.Marc二次开发在混凝土徐变问题中的应用[J].武汉大学学报(工学版),2006(1):44-47.GUO Hangzhong,WANG Jian,DONG Yuwen.Secondary development of Marc and its application to analysis of concrete creep[J].Engineering Journal of Wuhan University,2006(1):44-47.
[28] GOMEZ-FARIAS A,MONTOYA A,MILLWATER H.Complex finite element sensitivity method for creep analysis[J].International Journal of Pressure Vessels and Piping,2015,132(18):27-42.
[29] 储森森，严瑾.基于ANASYS的钢-混凝土连续组合桥梁结构收缩徐变效应仿真计算[J].工程与建设，2018,32(1):8-10.CHU Sensen,YAN Jin.Simulation of shrinkage and creep effect of steel-concrete continuous composite bridge structure based on ANASYS[J].Engineering and Construction,2018,32(1):8-10.
[30] 王梦梦.C40早龄期混凝土力学性能试验研究[D].北京：北京交通大学，2014.WANG Mengmeng.Experimental study on mechanical behavior of C40 concrete at early age[D].Beijing:Beijing Jiaotong University,2014.
[31] 刘清，韩风霞，于广明，等.再生粗骨料自密实混凝土基本力学性能[J].建筑材料学报，2020,23(5):1053-1060.LIU Qing,HAN Fengxia,YU Guangming,et al.Basic mchanical properies of recycled coarse aggregate self-compacting concrete[J].Journal of building materials,2020,23(5):1053-1060.
[32] 张凯，李北星，李广，等.片麻岩石粉掺入方式对混凝土性能的影响[J].水利水电技术(中英文),2023,54(1):187-198.ZHANG Kai,LI Beixing,LI Guang,et al.Effect of gneiss powder mixing mode on concrete performance[J].Water Resources and Hydropower Engineering,2023,54(1):187-198.
[33] 覃光焱.人工砂清水混凝土的研究及其外观质量评定[D].重庆：重庆交通大学，2008.QIN Guangyan.Study on manufactured sand fair-faced concrete and its apparent quality evalution[D].Chongqing:Chongqing Jiaotong University,2008.
[34] 杨剑勇，程晓凯.石粉对C60混合砂混凝土力学性能和徐变的影响[J].山西交通科技，2017,45(5):15-17.YANG Jianyong,CHENG Xiaokai.The influence of stone powder on the machanical performance and creep of C60 mixed sand concrete[J].Shanxi Science & Technology of Communications,2017,45(5):15-17.
[35] 尹志府，贾绿薇.加荷龄期对普通混凝土徐变性能的影响[J].混凝土及加筋混凝土，1986,8(5):36-39.YIN Zhifu,JIA Lvwei.Influence of loading age on creep behavior of ordinary concrete[J].Concrete,1986,8(5):36-39.
[36] 徐以艳.石灰岩质机制砂混凝土收缩和早期徐变试验研究[D].武汉：华中科技大学，2013.XU Yiyan.Experimental study on shrinkage and early creep of limestone mechanical sand concrete[D].Wuhan:Huazhong University of Science and Technology,2013.
基本信息:
DOI：10.13928/j.cnki.wrahe.2023.09.019
中图分类号:TU528
引用信息:
[1]何世钦,赵盈,王辉,等.加载龄期对机制砂自密实混凝土徐变性能影响[J],2023,54(09):210-219.DOI:10.13928/j.cnki.wrahe.2023.09.019.
基金信息:
河北省重点研发计划项目(19217617D);; 国家自然科学基金资助项目(51878006)
2023-01-12
2023
2023-04-13
2023-07-11
2023
1